<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<select onchange="window.location=this.value;">
	<option value="aa">aa</option>
	<option value="bb">aa</option>
	<option value="cc">aa</option>
	</select>
</body>
</html>